Journal of the Chilean Chemical Society

versión On-line ISSN 0717-9707

Resumen

Cadmium (II) electrode based on plasticized PVC membranes with 1-furoyl-3,3-diethyl thiourea as ionophore and tributylphosphate as plasticizer has been developed. The membrane was applied on a support of conducting epoxy resin. Some parameters of evaluation of the electrode are presented in this work. The constructed electrode showed linear response in the concentration range of 10-6 -10-3 mol/dm3, had a slope of 28.5 mV/decade, a detection limit (DL) of 2.10-6 mol/dm3 and a lower limit of lineal range (LLLR) of 4.2.10-6 mol/dm3. The static response time obtained was less than 20 seconds. The Cd/S relationship in the membrane was 1:1, as was determined by chemical microanalysis of energy dispersive X-ray spectroscopy (EDS). The constructed electrodes had a life-time of 5 days